The fire extinguisher contains NaHCO3 and the compound (X). The compound (X) maybe -

1. CH3COOH

2. NaOH

3. C6H5OH

4. None of the above. 

Subtopic:  Chemical Properties |
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

All group-2 metals dissolve in liquid ammonia to produce a bright blue colour. The colour is due to-

1. A change in the structure of ammonia.

2. d-d transition.

3. The spectrum of the solvated electrons.

4. An electronic transition from a lower to a higher energy state.

Subtopic:  Physical Properties |
 62%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

A substance that gives a brick red flame and breaks down on heating giving oxygen and a brown gas is-

1. Calcium carbonate.

2. Magnesium carbonate.

3. Magnesium nitrate.

4. Calcium nitrate.

Subtopic:  Compounds of Ca and Na -Preparations, Properties & Uses |
 56%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

advertisementadvertisement

A: Alkali metals can be extracted by chemical reduction

R: Alkali metals are weak reductants.

1. Both Assertion & Reason are true and the reason is the correct explanation of the assertion.

2. Both Assertion & Reason are true but the reason is not the correct explanation of the assertion.

3. Assertion is a true statement but Reason is false.

4. Both Assertion and Reason are false statements.

Subtopic:  Chemical Properties |
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.

Gypsum on heating can change to :

1. Orthorhombic form.

2. Plaster of paris.

3. Dead plaster.

4. All of the above.

Subtopic:  Compounds of Ca and Na -Preparations, Properties & Uses |
 70%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Hsolution is positive for

I. LiF

II. CsI

III. RbF

IV. KF

(1) I, II, III & IV

(2) II only

(3) I only

(4) I & II only

Subtopic:  Chemical Properties |
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

advertisementadvertisement

The cation of alkali metals are found as M(H2O)+n in H2O.

The value of 'n' is maximum for -

1. Na+

2. K+

3. Rb+

4. Li+

Subtopic:  Reasoning Questions |
 75%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

(NH4)2Cr2O7 on heating (below 200 degrees celsius) liberates a gas. The same gas will be obtained below 600 degrees celsius by :

1. Heating NH4NO2

2. Heating NH4NO3

3. Heating Mg3N2

4. None of the above

Subtopic:  Preparations, Properties & Uses of S Block Elements |
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

The incorrect statement among the following is : 

1. The atomic radius of Na is greater than that of Mg.

2. Density of K is more than Na.

3. Melting point & boiling point of Ca are greater than those of Mg.

4. Mg does not react with cold water.

Subtopic:  Physical Properties |
 75%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

advertisementadvertisement

A Brine solution on electrolysis will not give : 

1.  NaOH

2.  Cl2

3.  H2

4.  O2

Subtopic:  Compounds of Ca and Na -Preparations, Properties & Uses |
 69%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch